by the following month urooj khan was dead. now authorities believe his death was no accident, once classified as natural causes, cardiac, something or another. now it appears he was poisoned, a lethal dose of cyanide in his blood. did his winning lead to murder. they did not do an autopsy, 46 years old. why? >> i think it should have been done. a young person, 46, with no past history of any kind of illness, generally an autopsy would be done. they did draw blood and gave the body back to the family. the body is buried now and is going to be he can -- is going to be exhumed. the toxicologist didn'tor cyani. when somebody told them there would be an issue, they went back to the specimen of blood already drawn and found a lethal death of cyanide and changed the death certificate to cyanide poisoning. homicide. >>gretchen: somebody was on to this. we don't know why. but they called. the wife says she was the last to serve him dinner, that he had no enemies and her stepdaughter, child from another marriage, was also at dinner. tel